Good luck with that on DTube^^
Viewly is also a platform like DTube but they want an independent coin. Currently there is only the alpha version of Viewly which uses the Steemit blockchain. In this version you can paste a YouTube link and then it uploads it to Viewly. I never tried it so I don't know how well it works.
Try it out: https://upload.view.ly/

If you want to get updates about Viewly, then you could sign up to their newsletter with my affiliation link:
https://view.ly?a=jbpViewly

I would appreciate it :D